671815422456 has 32 divisors (see below), whose sum is σ = 1695235184640. Its totient is φ = 221845590368.

The previous prime is 671815422407. The next prime is 671815422457. The reversal of 671815422456 is 654224518176.

It is a junction number, because it is equal to n+sod(n) for n = 671815422399 and 671815422408.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (671815422457) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 130802616 + ... + 130807751.

It is an arithmetic number, because the mean of its divisors is an integer number (52976099520).

Almost surely, 2^671815422456 is an apocalyptic number.

It is an amenable number.

671815422456 is an abundant number, since it is smaller than the sum of its proper divisors (1023419762184).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

671815422456 is a wasteful number, since it uses less digits than its factorization.

671815422456 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 261610483 (or 261610479 counting only the distinct ones).

The product of its digits is 3225600, while the sum is 51.

The spelling of 671815422456 in words is "six hundred seventy-one billion, eight hundred fifteen million, four hundred twenty-two thousand, four hundred fifty-six".